Motor-control system.



M. Ri HANN'A.

MOTOR CONTROL SYSTEM.

APPLIoATIox FILED sLjP'r. 1a, 1911.

1,019,461. Patented Mar. 5, 1912.

' To all whom it may lconcern @miran sTArEs MAX R. EANNA, OF

,Specittatinn of Letters Patent.

PATENT OFFICE..

sc'HE'NeC'rADY, NEW YORK, AssIGNoR 'ro GENERAL ELECTRIC COMPANY, A CORPORATION or NEW YORK.

MOTOR-CONTROL SYSTEM.

Patented Mar. 5, 1912.

Application ined ,september 1s, 1911. serial No.`49,ss2.

Be it known that I, MAX `R. HA'NNA, a

citizen of the United States, residing at series. l provided on the several cars, itis, possible by Schenectady, county of Schenectady, State of New York, have invented certain new andjuseful Improvements in Motor-Control Systems, of which the following is a specifi,- cation. My invention relates to the control ofi "'otor-Operated trains in which there are rality of cars each equipped with driving motors, but in which the currentfor the motors is supplied from a source of current carried on one of thefcars. On such a'train the motors may ordinarily be controlledl from the car on whichV the source of current is located by controlling the voltage v-ot' 4the source, so switches, or their equivalent, are not required on the-several cars. It may, however, be desirable, in order to reduce to a minimum the number of power wires` extending through the train to'provide independent reversing switchesA on'the several cars,'which may bethrown manually to the proper position at :the beginning of each run. It may also be desirable to provide manually-operated .switchesfon the. several cars for connecting the motors in series or in parallel so that whenthe 'train is heavily loaded the motors ma be operated in arallcl, and when the train i's lightly loa ed, in If such independent switches are wrongly throwing some of the 'switches to establish various'wrong circuit combmations 'Sothat some of the motors may b e working againstcthers, or somel may be in parallel,

while others are in series.

In -the system which'constitutes'my invention 4independent switches are provided on 'i -the `several cars, as described above, andl 4 means are also provided for preventing the 'in the same position.

Supply of current to the motors unless all the independentl switches on the several cars are ,'Mynvention will best be understood by vrefe'rence to 'the accompanying drawingthat magnetically actuatedwhich shows diagrammaticalaly a motor control system arranged -in accordance with my invention.

, In the drawing, A represents the armature of a enerator, carried on one of the cars andriven by prime mover B, such, for instance, as a gasolene engine. The field winding Lof the generator is preferably separately excited so as to permit a Va- .riation of the generator voltage over a wide connected in series with the generator Held winding a through a resistance c. y

D represents the controlling switch for connecting the generator armature A to the power supply circuit, indicated by the conductors 1, 2, extending through the train, and to vary the amountofV resistance c in the field circuit so as to control the voltage of the generator.

The head car, aswell as each of the following cars, is equipped with driving motors. The motor armatures are indicated at E E and the fields ate e. On eachcar is provided a manually-operated reversing switch F .and a series-parallel switch G. The contacts comprised in each switch are inclosed in dotted lines, It will be seen'that the reversing switch F comprises three groups of contacts, of which t-he central and lower groups control the relative connections of field and armature of the two motors, respectively. The upper group of coutacts, which are 'auxiliary contacts, not included in the motor circuit, are connected to two parallel conductors 3 and 3' extending -through the t-rain. Similarly, the series parallel switch G has a lower group of main contacts which serve to connect the two mot-wo parallel con uctors 4 and 4 extending through the train. The conductor 3 passes in series through *a pair of auxiliary contacts upon each reversing switch, which are closed only when the reversing switch is thrown to one of its operative' positions,

and' these contacts are li 3e'contacts On the range, and such an exciter is indicated at C,

tors in series or in parallel, and an upper group of auxiliar contacts connected to the pendent switches on the several cars, said l extending through the i train each passing in ser-ies through like contacts on said indecontacts on each switch being closed only when said switch is in one of itsoperative positions, whereby one or the other-of said parallel conductors has its `circuit closed when, and only when, all'said independent switches are in the salue operative position, and a magnetically-controlled switch having its winding in seriesA with said conductors and its contacts controlling said supply circuit.

8. In a motor operated train, a plurality of cars each equipped with driving motors, a source of current on one car for supplying all the motors of the train, a. supplr circuit extending through the train to w ich the motor circuits on the several cars are connected in parallel, a second vcircuitextending through the train, and independent switches on the several cars included in the motory circuits and having contacts included in'said second c1rcu1t, sald contacts on the several cars being in4 series in saidsecond circuit', and a magnetically-controlled switchhaving its winding included in said, second circuit and its contacts controlling saidsupply cir- 9. 'In amotor operated, train, a plurality of carseach equipped with driving. motors, a source of current on one c'ar' for' supplying all the motors of the train,a supply extending through the train to wich the motor circuits on theyseveralv cars are con,-

' nected in parallel,=,independent.switches 'on the several cars included in said motor circuits, a control circuit extending through the train including in series contactscontrqlled. bysaid independent 'swtches,. and amfa 'netically-contolled switch having its win switches on the several'cars inc uded :in the motor circuits each having a plurality of operative positions, and'like auxiliary con-v tacts on said independent switches 'closed in like positions thereof included in series in said second circuit.Y

11. In a motor operated train,fa plurality of-,cars each equipped 'witl1 driving motors,

a source of current on onec'ar for supplying all the motors of the train, a supply circuit extending through the trai'ntowhich' the rnqtor circuits on the several. cars are connected in parallel, a second circuit extending through the train, and`indepefndent switches circuit on the yseveral cars included in the motor circuits each having a plurality of operative positions, like auxiliary contacts'on sald 1nependent switches closedin like positions thereof included in series in said second cir- 7g cuit, and means controlled by said second circuit controlling said suipply circuit.,

12. In a motor-operate train, a plurality of cars each equipped with driving motors, a source of current on one car for supplying, all the motors of the train, independent switches on the several cars included-in the motor circuits, each having a plurality of operative positions, a plurality of parallel conductors extending through the train, and 30 a plurality of sets of auxiliary contacts on each of said switches, one set being closed in each of the' operative positions of -the switch, like sets of contacts on the switches. on the. several cars being included in series 35 .in each vof said parallel conductors, whereby one or the other of said conductors has its circuit closed when, and only when, said switches are all in the same operative position. l.

13. In a motor operated train, a plurality of cars each equipped with' driving motors,

ja source of current on one car for supplying all the motors of the train, independent switches on the several cars included in the `motor circuits, each having a 'plurality of operative positions, a plurality of parallel v conductors extending through the train, and la` plurality? of sets of auxiliary contacts Aon each'of said switches arranged to close the 100 .circuit of one or the other of said parallel "conductors when, and only when, said switches-fare all in the same operative positiom.` v

4,111 a'motor operated train, a plurality' 105 of'cars each equipped with driving motors, a'source of current on one car for supplying all the'imotors of the'train, a suppl .circuit extending through the trainl to w ich the motor circuits on the several cars are con- 11(` nected in parallel, inde endent switches 'on the lseveral cars inclu ed in said motorA circuits, eac'h having a plurality vof operative positions, a plurality-tof -parallel conductors extending'througlrthe train, -a plurality of 1 1'5v sets4 of*y auxiliary contacts on each 'of said switches arrangedfto close -the circuit of yone or the otherQf 'said parallel'l conductors when, and only when, said switches' ar'e 'alll in the sameoperative position, anda ina 4 1,20 netically-contrlled switch Aliavligwinx ing in series vwith said parallelconductors 'and its contacts `controlling said'supply'cr'-y cuit.

15,. In a motor operated train, a :plurality 125 of cars each equipped with driving motors, a source of current on one car for supplying all the motors of the train, a supply circuitt extending through the train to which the motor circuits on the several carsv are, con- 13G -neied-nV :mall-el, a. second cr'cuitexteding' ,In witness whereof,V I have hereunto set through t e train', and .independent switches `my hand this 16thI day of September, 19 1 1, 1 0

lose `said second circuib, when,v and only Y Wihnesses: .when,sa1d swltchesare lal1- 11'1 the same HELENORFORD, 

